I have followed the dev guide and set up extensionless Urls by add below tag in the web.config
<modules runAllManagedModulesForAllRequests="true">
But now when I try to get a physical file like the path below. I have 404 error.
http://[domain]custom/[site]/[medialibrary]/[folder]/example.jpg
Is there any setting I have missed? Please advise. Thank you.